Hello All,I was playing with my ATmega325P and using internal 8MHz clock, and needed 115200 baud communication. To my dismay this was impossible because 115200 baud on normal UART yields 8.5% error. A friend recommended to use Asynchronous Double Speed Mode, which always yields a lower error of -3.5%. All I had to do was set the register (U2Xn = 1)